\documentclass[11pt,a4paper]{book}
\usepackage{tikz}
%\usepackage{xepersian}
\tikzset{terminal/.style={
							% The shape:
							rectangle ,minimum size =6mm,rounded corners,
							% The rest
							%very thick,draw=black!50,
							top color=green!10,bottom color=green!40,
							font=\ttfamily}}
\begin{document}
\begin{center}
\begin{tikzpicture}[ rounded corners ,ultra thick ]
	\draw[gray] (0,0) rectangle (2.5,2);
	\draw[gray,loosely dashdotdotted] (1.25,1) ellipse (1.15 and .9);
	\node at (1.25,1) [terminal]  {{\Large{(1,H)}}};
\end{tikzpicture}
\begin{tikzpicture}[ rounded corners ,ultra thick ]
	\draw[gray] (0,0) rectangle (2.5,2);
	\draw[gray,loosely dashdotdotted] (1.25,1) ellipse (1.15 and .9);		
	\node at (1.25,1) [terminal]  {{\Large{(1,T)}}};	
\end{tikzpicture}

\begin{tikzpicture}[ rounded corners ,ultra thick ]
	\draw[gray] (0,0) rectangle (2.5,2);
	\draw[gray,loosely dashdotdotted] (1.25,1) ellipse (1.15 and .9);
	\node at (1.25,1) [terminal]  {{\Large{(0,H)}}};
\end{tikzpicture}
\begin{tikzpicture}[ rounded corners ,ultra thick ]
	\draw[gray] (0,0) rectangle (2.5,2);
	\draw[gray,loosely dashdotdotted] (1.25,1) ellipse (1.15 and .9);		
	\node at (1.25,1) [terminal]  {{\Large{(0,T)}}};	
\end{tikzpicture}
\end{center}
\end{document}